After a long day at school，I walked home with my heavy schoolbag. Sleepy and (1) ，I threw my things on the couch and hurriedly took something from the (2) to eat．I passed by the living room and wished I could watch TV，but I knew my (3) would take me the whole night．I took my schoolbag and went (4) to my room．I tried to understand chemistry and (5) sleepiness at the same time．I tried to keep my eyes (6) and I wanted something to cheer me up．
Later, I (7) the sound of the front door opening．And I waited for it—the sound of my mom singing. Though she sang off-key（跑调），it made me (8) that she was here．I ran down to (9) her．We hugged each other and talked for a while．I like it when my mom was happy．Her (10) seemed to flow（流）down to me and I got the power to (11) the stress（压力）again．
Sometimes, I wonder how my mom can still be (12) after coming back from work．Every weekday，she wakes up (13) in the morning to go to work and spends all hour on the bus before getting downtown．At a (14) factory，she works standing for the whole day and draws patterns for clothes over and over．After work，my mom often gets stuck（卡在）in (15) for two hours on her way back home．When I (16) my school life with her work life, I should not be the one to complain．At least I have some interesting things to do at school, (17) if my mom makes one mistake at work, she will lose her job．I appreciate that my mom has a positive attitude and lives her life with a (18) heart，which encourages me to do my work well, (19) there may be difficulties. Seeing her happy makes me feel (20) ，too．